A Good Spring App?

I have some straglers who put off overseeding and would like to have it done in the spring.

Is there something (fert) I could sub for my pre-em that doesnt effect the seed and will give the grass a kickstart?

An entrepeneur is someone who takes a prospective employee to a hillside overlooking a great estate, points to the mansion, the swimming pool, the stables, the tennis courts and says, " If you come with me and work your butt off, someday, all of this WILL BE MINE" - Harvey Mackay

If the lawns have bad crabgrass problems, you could still use a pre-em. Tupersan will prevent crabgrass and you can still overseed w/o any problems. Most people apply a starter fert with seed, but starter in the spring will lead to more weeds than usual. Do a soil test to see what the P levels are. Without a soil test, I would use something like a 24-5-11 or a 20-10-10, 50% slow. Then you could do either another follow-up app with Tupersan again or if the seedlings are well established, a Dimension app in mid to late May. I don't know about your area, but around here if you do a spring seeding don't forget the preventative fungicide apps starting in May as well. Spring seedings can be a headache, procede with caution.